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First evidence of ψ(2S)→Ω~-■~+

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【作者】 阿布里克木·麦迪娜白景芝白羽班勇蔡啸陈宏芳陈和生陈江川陈进陈元柏陈初萍戴又善邓子艳杜书先方建傅成栋高原宁顾运厅郭子敬F.A.Huarris何康林何瑁衡月昆胡海明T.Hussain胡涛黄光顺黄性涛黄燕萍季晓斌江晓山焦健斌金大鹏金山李刚李海波李金李蕾李仁英李卫东李卫国李晓玲李小男李学潜梁勇飞刘北江刘春秀刘芳刘峰刘宏邦刘怀民刘觉平刘倩刘荣光刘振安吕峰鲁公儒吕军光罗成林马凤才马海龙马秋海M.Q.A.Malik毛泽普莫晓虎聂晶S.L.Olsen平荣刚邱进发荣刚阮向东单连友尚雷沈成平沈肖雁盛华义孙海生孙胜森孙永昭孙志嘉唐晓田俊平G.S.Varner万霞王岚王亮亮王灵淑王平王佩良王贻芳王铮王至勇魏诚林魏代会吴宁许国发俆新平俆晔阎沐霖杨洪勋杨明杨永栩叶铭汉叶云秀喻纯旭苑长征袁野曾云张丙新张炳云张长春张达华张华桥章红宇张家文张建勇张学尧张一云张子平赵京伟赵明刚赵平平赵政国郑波郑海青郑建平郑志鹏钟彬周莉朱科军朱启明朱兴旺朱永生朱自安邹冰松

【Author】 M.Ablikim1 J.Z.Bai1 Y.Bai1 Y.Ban11 X.Cai1 H.F.Chen17 H.S.Chen1 J.C.Chen1 J.Chen1 Y.B.Chen1 Y.P.Chu1 Y.S.Dai19 Z.Y.Deng1 S.X.Du1a J.Fang1 C.D.Fu1 Y.Gao15 Y.T.Gu4 Z.J.Guo16b F.A.Harris16 K.L.He1 M.He13 Y.K.Heng1 H.M.Hu1 T.Hussain1c T.Hu1 G.S.Huang17 X.T.Huang13 Y.P.Huang1 T.Hussain1c X.B.Ji1 X.S.Jiang1 J.B.Jiao13 D.P.Jin1 S.Jin1 G.Li1 H.B.Li1 J.Li1 L.Li1 R.Y.Li1 W.D.Li1 W.G.Li1 X.L.Li13 X.N.Li1 X.Q.Li10 Y.F.Liang14 B.J.Liu1 C.X.Liu1 Fang Liu1 Feng Liu6 H.B.Liu4 H.M.Liu1 J.P.Liu18 Q.Liu16d R.G.Liu1 Z.A.Liu1 F.Lu1 G.R.Lu5 J.G.Lu1 X.L.Luo9 F.C.Ma8 H.L.Ma1 Q.M.Ma1 M.Q.A.Malik1c Z.P.Mao1 X.H.Mo1 J.Nie1 S.L.Olsen12 R.G.Ping1 J.F.Qiu1 G.Rong1 X.D.Ruan4 L.Y.Shan1 L.Shang1 C.P.Shen16e X.Y.Shen1 H.Y.Sheng1 S.S.Sun1 S.S.Sun1 Y.Z.Sun1 Z.J.Sun1 X.Tang1 J.P.Tian15 G.S.Varner16 X.Wan1 L.Wang1 L.L.Wang1 L.S.Wang1 P.Wang1 P.L.Wang1 Y.F.Wang1 Z.Wang1 Z.Y.Wang1 C.L.Wei1 D.H.Wei3 N.Wu1 G.F.Xu1 X.P.Xu6f Y.Xu10 M.L.Yan17 H.X.Yang1 M.Yang1 Y.X.Yang3 M.H.Ye2 Y.X.Ye17 C.X.Yu10 C.Z.Yuan1 Y.Yuan1 Y.Zeng7 B.X.Zhang1 B.Y.Zhang1 C.C.Zhang1 D.H.Zhang1 H.Q.Zhang1 H.Y.Zhang1 J.W.Zhang1 J.Y.Zhang1 X.Y.Zhang13 Y.Y.Zhang14 Z.P.Zhang17 J.W.Zhao1 M.G.Zhao10 P.P.Zhao1 Z.G.Zhao17 B.Zheng1 H.Q.Zheng11 J.P.Zheng1 Z.P.Zheng1 B.Zhong1 L.Zhou1 K.J.Zhu1 Q.M.Zhu1 X.W.Zhu1 Y.S.Zhu1 Z.A.Zhu1 B.S.Zou1 1 Institute of High Energy Physics,Beijing 100049,China 2 China Center of Advanced Science and Technology,Beijing 100190,China 3 Guangxi Normal University,Guilin 541004,China 4 Guangxi University,Nanning 530004,China 5 Henan Normal University,Xinxiang 453007,China6 Huazhong Normal University,Wuhan 430079,China 7 Hunan University,Changsha 410082,China 8 Liaoning University,Shenyang 110036,China 9 Nanjing Normal University,Nanjing 210046,China 10 Nankai University,Tianjin 300071,China 11 Peking University,Beijing 100871,China 12 Seoul National University,Seoul,151-747 Korea 13 Shandong University,Jinan 250100,China 14 Sichuan University,Chengdu 610064,China 15 Tsinghua University,Beijing 100084,China 16 University of Hawaii,Honolulu,Hawaii 96822,USA 17 University of Science and Technology of China,Hefei 230026,China 18 Wuhan University,Wuhan 430072,China 19 Zhejiang University,Hangzhou 310027,China a now at Zhengzhou University,Zhengzhou 450001,China b now at Johns Hopkins University,Baltimore,MD 21218,USA c now at Centre for High Energy Physics,University of the Punjab,Lahore-54590,Pakistan d now at Graduate University of Chinese Academy of Sciences,Beijing 100049,China e now at Nagoya University,Nagoya,Japan f now at Soochow University,Suzhou 215006,China

【机构】 Institute of High Energy PhysicsPeking UniversityUniversity of Science and Technology of ChinaZhejiang UniversityZhengzhou UniversityTsinghua UniversityGuangxi UniversityUniversity of Hawaii,HonoluluJohns Hopkins UniversityShandong UniversityCentre for High Energy Physics,University of the PunjabNankai UniversitySichuan UniversityHuazhong Normal UniversityWuhan UniversityGraduate University of Chinese Academy of SciencesHenan Normal UniversityNanjing Normal UniversityLiaoning UniversitySeoul National UniversityNagoya UniversityGuangxi Normal UniversitySoochow UniversityChina Center of Advanced Science and TechnologyHunan University

【摘要】 The decay ψ(2S) →Ω-■+ is analyzed using 14 × 106 ψ(2S) events recorded by the Beijing Spectrometer Ⅱ(BESⅡ) at the Beijing Electron Positron Collider(BEPC).Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic fit,we determine the upper limit for the branching fraction of ψ(2S)→Ω-■+ to be 1.5×10-4 at a 90% confidence level.By including events with one missing charged track,we are able to report the first evidence of an Ω-■+ signal with a statistical significance of 3.1σ.The branching fraction of ψ(2S)→Ω-■+ is determined to be(4.80±1.56(stat)±1.30(sys))×10-5.

【Abstract】 The decay ψ(2S)→Ω-■+ is analyzed using 14×106 ψ(2S) events recorded by the Beijing Spectrometer Ⅱ(BESⅡ) at the Beijing Electron Positron Collider(BEPC).Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic fit,we determine the upper limit for the branching fraction of ψ(2S)→Ω-■+ to be 1.5×10-4 at a 90% confidence level.By including events with one missing charged track,we are able to report the first evidence of an Ω-■+ signal with a statistical significance of 3.1σ.The branching fraction of ψ(2S)→Ω-■+ is determined to be(4.80±1.56(stat)±1.30(sys))×10-5.

【基金】 Supported by National Natural Science Foundation of China(10491300,10225524,10225525,10425523,10625524,10521003, 10821063,10825524);Chinese Academy of Sciences(KJ 95T-03);100 Talents Program of CAS(U-11,U-24,U-25);Knowledge Innovation Project of CAS(U-602,U-34(IHEP));National Natural Science Foundation of China(10775077,10225522)(Tsinghua University);Department of Energy(DE-FG02-04ER41291)(U.Hawaii)
  • 【文献出处】 Chinese Physics C ,中国物理C , 编辑部邮箱 ,2012年11期
  • 【分类号】O572.214
  • 【下载频次】60
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